I agree that USC was playing very good football at the end of the year. Who knows what would have happened in hypothetical playoffs, that is a very dangerous team.
However, I've heard too much about how USC WOULD DEFINETELY beat OSU though. OSU played a phenomenal season, had its ups and downs, but won every single game. College Football right now does not allow for streakiness. You have to play consistent enough football to win all of your games. OSU did what it had to do to give itself a shot, if USC would have done the same then maybe things would be different. Everybody thought that Miami was going to roll over OSU as well, didn't happen. I would love to see a game between USC and OSU though, it would be a great game.
USC's offense was limited by a quality defense in Kansas State (27-20). It could be done. I think USC vs OSU would've been a similar result as the title game last night, call it 20-17, no OT due to a missed field goal. USC vs Miami, on the other hand, would've been a 43-34 shoot-out... 27-10 at the half, and half the nation tunes out... some desperation drives at the end... not a nail-biter.